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Varistor Products
Aerospace and Military
High Reliability Varistors
The high reliability Littelfuse varistor is the latest step in increased product performance, and is available for applications requiring quality and reliability assurance levels consistent with military or other standards. (MIL-STD-19500, MIL-S-750, Method 202). Additionally, Littelfuse varistors are inherently radiation hardened compared to silicon diode suppressors as illustrated in Figure 1. This series of high-reliability varistors involve five categories: * DSSC Qualified Parts List (QPL) MIL-R-83530 4 Types Presently Available * DSSC Standard Military Drawings Based on MIL-R 83530 63 Types Presently Available: - ZA Series - Drawing # 87063 - DB Series - Drawing # 90065 * Littelfuse High Reliability Series Offers TX Equivalents 29 Types Presently Available * Custom Types Processed to Customer-Specific Requirements - (SCD) or to Standard Military Flow * Commercial Items have been identified for Government use as follows: - Commercial Item Description AA-55564-3 - Littelfuse ZA Series - Commercial Item Description AA-55564-2 - Littelfuse DA, DB Series - Commercial Item Description AA-55564-1 - Littelfuse PA Series
MIL QPL
AGENCY APPROVALS
* DSSC Approved * QPL Listed * CECC Certified * ISO Approved * UL Recognized * CSA Certified
2
VARISTOR PRODUCTS
CLAMPING VOL AGE T AT PEAK CURRENT RATING (V) 570 650 1200 1450 ITM (A) NEAREST COMMERCIAL EQUIVALENT 6000 V130LA20B 6000 V150LA20B 6000 V275LA40B 6000 V320LA40B
145
DSSC Qualified Parts List (QPL) MIL-R-83530
TABLE 1. MIL-R-83530/1 RATINGS AND CHARACTERISTICS
VOL AGE T RATING (V) TOLERANCE (%) 10 +10, -5 +5, -10 +5, -10 ENERGY RATING (J) 50 55 100 120
P ART NUMBER M83530/ 1-2000B 1-2200D 1-4300E 1-5100E
NOMINAL VARISTOR VOL AGE T (V) 200 220 430 510
(RMS) (DC) 130 150 275 320 175 200 369 420
CLAMPING VOL AGE T AT 100A (V) 325 360 680 810
CAPACITANCE AT 1MHz (pF) 3800 3200 1800 1500
This series of varistors are screened and conditioned in accordance with MIL-R-83530 as outlined in Table 2. Manufacturing system conforms to MIL-I-45208; MIL-Q-9858.
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Varistor Products
Aerospace and Military
High Reliability Varistors
MIL-R-83530 Inspections
TABLE 2. MIL-R-83530 GROUP A, B, AND C INSPECTIONS
AQL (PERCENT DEFECTIVE) NUMBER OF SAMPLE UNITS FAILURES ALLOWED
INSPECTION Group A SUBGROUP 1 High Temperature Life (Stabilization Bake) Thermal Shock Power Burn-In Clamping Voltage Nominal Varistor Voltage SUBGROUP 2 Visual and Mechanical Examination Body Dimensions Diameter and Length of Leads Marking Workmanship SUBGROUP 3 Solderability Group B SUBGROUP 1 Dielectric Withstanding Voltage SUBGROUP 2 Resistance to Solvents SUBGROUP 3 Terminal Strength (Lead Fatigue) Moisture Resistance Peak Current Energy Group C EVERY 3 MONTHS High Temperature Storage Operating Life (Steady State) Pulse Life Shock Vibration Constant Acceleration Energy
MAJOR
MINOR
100% 100% 100% 100% 100%
-
-
-
-
-
1.0% AQL 7.6% LQ
25% AQL 13.0% LQ
Per Plan Per Plan Per Plan Per Plan Per Plan
-
-
-
-
Per Plan
-
-
-
-
Per Plan
-
-
-
-
Per Plan
-
-
-
-
Per Plan Per Plan Per Plan Per Plan
-
-
-
-
10 10 10 10 10 10 10
0 0 0 0 0 0 0
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Varistor Products
Aerospace and Military
High Reliability Varistors
DSSC Standard Military Drawing # 87063
Based on MIL-R-83530
TABLE 3. ZA SERIES RATINGS AND SPECIFICATIONS
MAXIMUM RATINGS (85 oC) CONTINUOUS TRANSIENT SPECIFICATIONS (25 oC) MAXIMUM CLAMPING VOLTAGE VC AT TEST CURRENT (8/20s) VC (V) 51 47 43 43 43 IC (A) 2 5 5 10 20
2
VARISTOR PRODUCTS
147
87063 DASH NO. 001 002 003 004 005
PEAK ENERGY CURRENT (SEE RMS DC (10/1000s) (8/20s) CHAPTER 2) NEAREST VM(AC) VM(DC) WTM ITM (PAGE 143) COMM. (V) (V) (J) (A) SIZE EQUIV. V22ZA05 V22ZA1 V22ZA2 V22ZA3 V24ZA50 1 2 3 4 5 14 14 14 14 14 18 18 18 18 18 0.2 0.9 2.0 4.0 6.5 35 150 350 750 1500
VARISTOR VOLTAGE AT 1mA DC TEST CURRENT MIN (V) 18.7 18.7 18.7 18.7 19.2 VN(DC) (V) 22 22 22 22 24
(PAGE 143)
TYPICAL CAPACITANCE f = 1MHz (pF) 400 1600 4000 9000 18000
MAX (V) 26 26 26 26 26
006 007 008 009 010
V27ZA05 V27ZA1 V27ZA2 V27ZA4 V27ZA60
1 2 3 4 5
17 17 17 17 17
22 22 22 22 22
0.25 1.0 2.5 5.0 8.0
35 150 350 750 1500
23 23 23 23 23
27 27 27 27 27
(PAGE 143)
31.1 31.1 31.1 31.1 31.1
59 57 53 53 50
2 5 5 10 20
300 1300 3000 7000 15000
011 012 013 014 015
V33ZA05 V33ZA1 V33ZA2 V33ZA5 V33ZA70
1 2 3 4 5
20 20 20 20 21
26 26 26 26 27
0.3 1.2 3.0 6.0 9.0
35 150 350 750 1500
29.5 29.5 29.5 29.5 29.5
33 33 33 33 33
(PAGE 143)
38 36.5 36.5 36.5 36.5
67 68 64 64 58
2 5 5 10 20
250 1100 2700 6000 13000
016
V36ZA80
5
23
31
10.0
1500
32
36
(PAGE 143)
40
63
20
12000
017 018 019 020 021 022 023 024 025
V39ZA05 V39ZA1 V39ZA3 V39ZA6 V47ZA05 V47ZA1 V47ZA3 V47ZA7 V56ZA05
1 2 3 4 1 2 3 4 1
25 25 25 25 30 30 30 30 35
31 31 31 31 38 38 38 38 45
0.35 1.5 3.5 7.2 0.4 1.8 4.5 8.8 0.5
35 150 350 750 35 150 350 750 35
35 35 35 35 42 42 42 42 50
39 39 39 39 47 47 47 47 56
46 43 43 43 55 52 52 52 66
79 79 76 76 90 92 89 89 108
2 5 5 10 2 5 5 10 2
220 900 2200 5000 200 800 2000 4500 180
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Varistor Products
Aerospace and Military
High Reliability Varistors
TABLE 3. ZA SERIES RATINGS AND SPECIFICATIONS
(Continued)
MAXIMUM RATINGS (85 oC) CONTINUOUS TRANSIENT
SPECIFICATIONS (25 oC) MAXIMUM CLAMPING VOLTAGE VC AT TEST CURRENT (8/20s) VC (V) 107 103 103 127 127 123 123 145 135 135 145 175 165 165 175 205 205 200 210 240 250 250 255 290 295 300 300 IC (A) 5 5 10 2 5 5 10 2 10 25 50 2 10 25 50 2 10 25 50 2 10 25 50 2 10 25 50
87063 DASH NO. 026 027 028 029 030 031 032 033 034 035 036 037 038 039 040 041 042 043 044 045 046 047 048 049 050 051 052
(SEE RMS DC SECTION 4) NEAREST VM(AC) VM(DC) COMM. (NOTE 1) EQUIV. SIZE (V) (V) V56ZA2 V56ZA3 V56ZA8 V68ZA05 V68ZA2 V68ZA3 V68ZA10 V82ZA05 V82ZA2 V82ZA4 V82ZA12 V100ZA05 V100ZA3 V100ZA4 V100ZA15 V120ZA05 V120ZA1 V120ZA4 V120ZA6 V150ZA05 V150ZA1 V150ZA4 V150ZA8 V180ZA05 V180ZA1 V180ZA5 V180ZA10 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 35 35 35 40 40 40 40 50 50 50 50 60 60 60 60 75 75 75 75 92 95 95 95 110 115 115 115 45 45 45 56 56 56 56 66 66 66 66 81 81 81 81 102 102 102 102 127 127 127 127 153 153 153 153
PEAK ENERGY CURRENT (10/1000s) (8/20s) WTM (J) 2.3 5.5 10.0 0.6 3.0 6.5 13.0 1.2 3.5 7.3 13.0 1.5 4.3 8.9 16.0 1.8 5.3 11.0 19.0 2.3 6.5 13.0 23.0 2.7 7.7 16.0 27.0 ITM (A) 150 350 750 35 150 350 750 70 300 750 1500 70 300 750 1500 100 400 1000 2000 100 400 1000 2000 150 500 1500 3000
VARISTOR VOLTAGE AT 1mA DC TEST CURRENT MIN (V) 50 50 50 61 61 61 61 73 73 73 73 90 90 90 90 108 108 108 108 135 135 135 135 162 162 162 162 VN(DC) (V) 56 56 56 68 68 68 68 82 82 82 82 100 100 100 100 120 120 120 120 150 150 150 150 180 180 180 180 MAX (V) 62 62 62 80 75 75 75 97 91 91 91 117 110 110 110 138 132 132 132 173 165 165 165 207 198 198 198
TYPICAL CAPACITANCE f = 1MHz (pF) 700 1800 3900 150 600 1500 3300 120 500 1100 2500 90 400 900 2000 70 300 750 1700 60 250 600 1400 50 200 500 1100
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Varistor Products
Aerospace and Military
High Reliability Varistors
DSSC Standard Military Drawing # 90065
Based on MIL-R-83530
VOLTAGE RATING MAX (RMS) 130 150 250 275 320 420 480 510 575 660 750 NOMINAL VARISTOR VOLTAGE (V) 200 240 390 430 510 680 750 820 910 1050 1200 +28, -16 28 +39, -36 43 +29, -48 +68, -70 +74, -80 +91, -85 +95, -105 110 120 MAX CLAMPING VOLTAGE AT TEST CURRENT (V) 345 405 650 730 830 1130 1240 1350 1480 1720 2000 (I) 200 200 200 200 200 200 200 200 200 200 200
90065 DASH NO. 012 013 014 015 016 017 018 019 020 021 022
ENERGY MAX (J) 170 200 270 300 350 460 510 550 600 690 810
PEAK CURRENT (A) 22500 22500 22500 22500 22500 28800 28800 28800 28800 28800 28800
TYPICAL CAPACITANCE (pF) 10000 8000 5000 4500 3800 3000 2700 2500 2200 2000 1800
2
VARISTOR PRODUCTS
149
NOTE: See Section 4 (DB Series) for nearest equivalent commercial type.
TABLE 4. DB SERIES RATINGS AND SPECIFICATIONS
Littelfuse High Reliability Series TX Equivalents
TABLE 5. AVAILABLE TX MODEL TYPES
(SEE SECTION 4) NEAREST COMMERCIAL EQUIVALENT V8ZA1 V8ZA2 V12ZA1 V12ZA2 V22ZA1 V22ZA3 V24ZA50 V33ZA1 V33ZA5 V33ZA70 V68ZA2 V68ZA10 V82ZA2 V82ZA12 V130LA2 V130LA10A V130LA20A (SEE SECTION 4) NEAREST COMMERCIAL EQUIVALENT V150LA2 V150LA10A V150LA20B V250LA4 V250LA20A V250LA40B V420LA20A V420LA40B V480LA40A V480LA80B V510LA40A V510LA80B
TX MODEL V8ZTX1 V8ZTX2 V12ZTX1 V12ZTX2 V22ZTX1 V22ZTX3 V24ZTX50 V33ZTX1 V33ZTX5 V33ZTX70 V68ZTX2 V68ZTX10 V82ZTX2 V82ZTX12 V130LTX2 V130LTX10A V130LTX20B
MODEL SIZE 7mm 10mm 7mm 10mm 7mm 14mm 20mm 7mm 14mm 20mm 7mm 14mm 7mm 14mm 7mm 14mm 20mm
DEVICE MARK 8TX1 8TX2 12TX1 12TX2 22TX1 22TX3 24TX50 33TX1 33TX5 33TX70 68TX2 68TX10 82TX2 82TX12 130TX 130TX10 130TX20
TX MODEL V150LTX2 V150LTX10A V150LTX20B V250LTX4 V250LTX20A V250LTX40B V420LTX20A V420LTX40B V480LTX40A V480LTX80B V510LTX40A V510LTX80B
MODEL SIZE 7mm 14mm 20mm 7mm 14mm 20mm 14mm 20mm 14mm 20mm 14mm 20mm
DEVICE MARK 150TX 150TX10 150TX20 250TX 250TX20 250TX40 420TX20 420TX40 480TX40 480TX80 510TX40 510TX80
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Varistor Products
Aerospace and Military
High Reliability Varistors
The TX series of varistors are 100% screened and conditioned in accordance with MIL-STD-750. Tests are as outlined in Table 6.
INSPECTION LOTS FORMED AFTER ASSEMBL Y
LOTS PROPOSED FOR TX TYPES
REVIEW OF DATA 100% SCREENING TX PREPARATION FOR DELIVERY
QA ACCEPTANCE SAMPLE PER APPLICABLE DEVICE SPECIFICATION
TABLE 6. TX EQUIVALENTS SEREIES 100% SCREENING
MIL-STD-105 LEVEL Electrical (Bidirectional) VN(DC), V C (Per Specifications Table) Dielectric Withstand Voltage MIL-STD-202, Method 301, 2500V Min at 1.0ADC Solderability MIL-STD-202, Method 208, No Aging, Non-Activated II AQL 0.1 LTPD -
-
-
15
-
-
15
TABLE 7. QUALITY ASSURANCE ACCEPTANCE TEST
SCREEN High Temperature Life (Stabilization Bake) Thermal Shock (Temperature Cycling) Humidity Life Interim Electrical VN(DC) V C (Note 3) Power Burn-In Final Electrical +VN(DC) V C (Note 3) 1038 MIL-STD-750 METHOD 1032 CONDITION 24 hours min at max rated storage temperature. No dwell is required at 25oC. Test condition A1, 5 cycles -55oC to 125 oC (extremes) >10 minutes. 85oC, 85% R.H., 168Hr. As specified, but including delta parameter as a minimum. Condition B, 85oC, rated VM(AC), 72 hours min. As specified - All parameter measurements must be completed within 96 hours after removal from burn-in conditions. 2071 To be performed after complete marking. TX REQUIREMENTS 100%
1051
100%
100% 100% Screen
100% 100% Screen
External Visual Examination
100%
150
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Varistor Products
Aerospace and Military
High Reliability Varistors
Custom Types
In addition to our comprehensive high-reliability series as referenced above. Additional mechanical and environmental capabilities are defined in Table 8. Littelfuse can screen and condition to customer-specific requirements.
TABLE 8. MECHANICAL AND ENVIRONMENTAL CAPABILITIES (TYPICAL CONDITIONS)
TEST NAME Terminal Strength Drop Shock Variable Frequency Vibration Constant Acceleration Salt Atmosphere Soldering Heat/Solderability Resistance to Solvents Flammability Flammability Cyclical Moisture Resistance Steady-State Moisture Resistance Biased Moisture Resistance Temperature Cycle High-Temperature Life (Nonoperating) Burn-In Hermetic Seal MIL-STD-202-107 MIL-STD-750-1032 MIL-STD-750-1038 MIL-STD-750-1071 TEST METHOD MIL-STD-750-2036 MIL-STD-750-2016 MIL-STD-750-2056 MIL-STD-750-2006 MIL-STD-750-1041 MIL-STD-750-2031/2026 MIL-STD-202-215 MIL-STD-202-111 UL1414 MIL-STD-202-106 DESCRIPTION
2
VARISTOR PRODUCTS
102
3 Bends, 90o Arc, 16oz. Weight 1500g's, 0.5ms, 5 Pulses, X1, V 1, Z1 20g's, 100-2000Hz, X1, V 1, Z1 V2, 20,000g's Min 35oC, 24Hr, 10-50g/m2 Day 260oC, 10s, 3 Cycles, Test Marking Permanence, 3 Solvents 15s Torching, 10s to Flameout 3 x 15s Torching 10 Days 85/85 96Hr Not Recommended for High-Voltage Types -55oC to 125oC, 5 Cycles 125oC, 24Hr Rated Temperature and VRMS Condition D
Radiation Hardness
For space applications, an extremely important property of a protection device is its response to imposed radiation effects.
LITTELFUSE MOV 200 V 100 80 60 SILICON TRANSIENT SUPPRESSION DIODE
Electron Irradiation
A Littelfuse MOV and a silicon transient suppression diode were exposed to electron irradiation. The V-I curves, before and after test, are shown in Figure 1. It is apparent that the Littelfuse MOV was virtually unaffected, even at the extremely high dose of 108 rads, while the silicon transient suppression diode showed a dramatic increase in leakage current.
40
PRE TEST 108 RADS, 18MeV ELECTRONS
20
108
106
104 CURRENT (A)
FIGURE 1. RADIATION SENSITIVITY OF LITTELFUSEV130LA1 AND SILICON TRANSIENT SUPPRESSION DIODE
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Varistor Products
Aerospace and Military
High Reliability Varistors
Neutron Effects
A second MOV-zener comparison was made in response to neutron fluence. The selected devices were equal in area. Figure 2 shows the clamping voltage response of the MOV and the zener to neutron irradiation to as high as 1015 N/cm2 . It is apparent that in contrast to the large change in the zener, the MOV is unaltered. At highercurrents where the MOV's clamping voltage is again unchanged, the zener device clamping voltage increases by as much as 36%.
300 1.5K 200 INITIAL 200 VARISTOR V130A2 INITIAL A 10 15 T 100 80 VOLTS 60 50 40 30 20 BREAKDO WN VOLTAGE SATURATION CURRENT I FORWARD BIAS
V REDUCTION IN FAILURE STRESSHOLD BY RADIAL SECONDARY BREAKDO WN
1.5K 200 AT 10 12
REVERSE BIAS
FIGURE 3. V-I CHARACTERISTIC OF PN-JUNCTION
1.5K 200 AT 10 13
1.5K 200 AT 1014
1.5K 200 AT 10 15
10 10
10
108
106 107 AMPERES
105
104
103
At low reverse voltage, the device will conduct very little current (the saturation current). At higher reverse voltage VBO (breakdown voltage),the current increases rapidly as the electrons are either pulled by the electric field (Zener effect) or knocked out by other electrons (avalanching). A further increase in voltage causes the device to exhibit a negative resistance characteristic leading to secondary breakdown. This manifests itself through the formation of hotspots, and irreversible damage occurs. This failure threshold decreases under neutron irradiation for zeners, but not for Zinc Oxide Varistors.
FIGURE 2. V-I CHARACTERISTIC RESPONSE TO NEUTRON IRRADIA TION FOR MOV AND ZENER DIODE DEVICES
Counterclockwise rotation of the V-I characteristics is observed in silicon devices at high neutron irradiation levels; in other words, increasing leakage at low current levels and increasing clamping voltage at higher current levels. The solid and open circles for a given fluence represent the high and low breakdown currents for the sample of devices tested. Note that there is a marked decrease in current (or energy) handling capability with increased neutron fluence. Failure threshold of silicon semiconductor junctions is further reduced when high or rapidly increasing currents are applied. Junctions develop hot spots, which enlarge until a short occurs if current is not limited or quickly removed. The characteristic voltage current relationship of a PN-Junction is shown in Figure 3.
Gamma Radiation
Radiation damage studies were performed on type V130LA2 varistors. Emission spectra and V-I characteristics were collected before and after irradiation with 106 rads Co60 gamma radiation. Both show no change, within experimental error, after irradiation.
152
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Varistor Products
Aerospace and Military
High Reliability Varistors
Commercial Item Descriptions
The General Services Administration has authorized the use of the Commercial Item Description (CID) for all government agencies. There are 3 listed series within Littelfuse leaded/Industrial range: A-A-55564-3 ZA Series A-A-55564-2 DA/DB Series A-A-55564-1 PA Series The PIN number should be used to buy commercial product to the CID. The manufacturer's number shown should not be used for ordering purposes. PIN consists of: Abbreviated CID number + Applicable Sheet (2 digits) + Dash number (-3 digits) e.g. AA55564 + 02 + -001 = AA5556402-001
2
VARISTOR PRODUCTS DASH NUMBER AA5556403EQUIV. LITTELFUSE COMMERCIAL PART MFR'S CAGE
ZA Series A-A-55564-3
DASH NUMBER AA5556403EQUIV.. LITTELFUSE COMMERCIAL PART DASH NUMBER AA5556403EQUIV. LITTELFUSE COMMERICAL PART
001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019 020 021
V22ZA05 V22ZA1 V22ZA2 V22ZA3 V24ZA50 V27ZA05 V27ZA1 V27ZA2 V27ZA4 V27ZA60 V33ZA05 V33ZA1 V33ZA2 V33ZA5 V33ZA70 V36ZA80 V39ZA05 V39ZA1 V39ZA3 V39ZA6 V47ZA05
022 023 024 025 026 027 028 029 030 031 032 033 034 035 036 037 038 039 040 041 042
V47ZA1 V47ZA3 V47ZA7 V56ZA05 V56ZA2 V56ZA3 V56ZA8 V68ZA05 V68ZA2 V68ZA3 V68ZA10 V82ZA05 V82ZA2 V82ZA4 V82ZA12 V100ZA05 V100ZA3 V100ZA4 V100ZA15 V120ZA05 V120ZA1
043 044 045 046 047 048 049 050 051 052 053 054 055 056 057 058 059 060 061 062 063
V120ZA4 V120ZA6 V150ZA05 V150ZA1 V150ZA4 V150ZA8 V180ZA05 V180ZA1 V180ZA5 V180ZA10 V8ZA05 V8ZA1 V8ZA2 V12ZA05 V12ZA1 V12ZA2 V18ZA05 V18ZA1 V18ZA2 V18ZA3 V18ZA40
S6019
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Varistor Products
Aerospace and Military
High Reliability Varistors
DA/DB SERIES A-A-55564-2
DASH NUMBER AA5556402MFR's CAGE EQUIV. LITTELFUSE COMMERCIAL PART DASH NUMBER AA5556402MFR'S CAGE EQUIV. LITTELFUSE COMMERCIAL PART
001 002 003 004 005 006 007 008 009 010 011
S6019
V131DA40 V151DA40 V251DA40 V271DA40 V321DA40 V421DA40 V481DA40 V511DA40 V571DA40 V661DA40 V751DA40
012 013 014 015 016 017 018 019 020 021 022
S6019
V131DB40 V151DB40 V251DB40 V271DB40 V321DB40 V421DB40 V481DB40 V511DB40 V571DB40 V661DB40 V751DB40
PA SERIES A-A-55564-1
EQUIV. LITTELFUSE COMMERCIAL PART DASH NUMBER AA5556401EQUIV. LITTELFUSE COMMERCIAL PART
DASH NUMBER AA5556401-
MFR's CAGE
MFR'S CAGE
001 002 003 004 005 006 007 008 009 010
S6019
V130PA20A V130PA20C V150PA20A V150PA20C V250PA40A V250PA40C V275PA40A V275PA40C V320PA40A V320PA40C
011 012 013 014 015 016 017 018 019 020
S6019
V420PA40A V420PA40C V480PA80A V480PA80C V510PA80A V510PA80C V575PA80A V575PA80C V660PA100A V660PA100C
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